Strength of Acids

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Farah Abumeri 3F
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Strength of Acids

Postby Farah Abumeri 3F » Wed Dec 02, 2020 11:18 am

In today's lecture (Dec 2nd), Dr. Lavelle was comparing the strength of two strong acids: HBr and HCl. Is an acid with a weaker bond (which in this case is HBr, since it is larger) a stronger acid because it can give away a H+ to form H3O+ more easily? I was confused whether HCl or HBr was the stronger acid. Thanks in advance!

Arielle Sass 2A
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Re: Strength of Acids

Postby Arielle Sass 2A » Wed Dec 02, 2020 11:20 am

Hi, you're right that HBr is a stronger acid than HCl, because it has a weaker bond so it dissociates more easily, causing it to give off more H+ ions in the solution. In the scheme of all acids though, I think both HBr and HCl are considered strong.

Sabrina Galvan 3J
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Re: Strength of Acids

Postby Sabrina Galvan 3J » Wed Dec 02, 2020 2:05 pm

Yes! Because Br is larger, it has a weaker bond to H, allowing it to dissociate more easily and completely, as all strong acids are assumed to completely dissociate within a solution.

Maaria Abdel-Moneim 2G
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Re: Strength of Acids

Postby Maaria Abdel-Moneim 2G » Wed Dec 02, 2020 3:18 pm

HBr is the stronger acid. Since Br is larger than Cl the bond length of HBr is larger making it a weaker bond. This allows the bond to break much easier and therefore it can more easily donate H+ compared to HCl.

alebenavides
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Re: Strength of Acids

Postby alebenavides » Wed Dec 02, 2020 6:36 pm

yes br is a stronger acid !

Michael Sun Dis 3G
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Re: Strength of Acids

Postby Michael Sun Dis 3G » Thu Dec 03, 2020 4:15 pm

HBr is indeed stronger, as it dissociates more easily than HCl, resulting in a higher concentration of H+ in solution.

Jiapeng Han 1C
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Re: Strength of Acids

Postby Jiapeng Han 1C » Fri Dec 04, 2020 10:27 pm

HBr is the stronger acid because it has longer H-A bond, so weaker attraction between H and Br, thus proton is more easily dissociated.

Jason_John_2F
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Re: Strength of Acids

Postby Jason_John_2F » Sat Dec 05, 2020 5:37 pm

acids are stronger when they can easily dissociate in water and since br has a longer and weaker bond then it makes the stronger acid

Simi Kapila_3E
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Re: Strength of Acids

Postby Simi Kapila_3E » Sat Dec 05, 2020 5:41 pm

Yes, you're right, since Br is a bigger atom, it is farther away from H, making the bond length longer, and thus creating a weaker bond. Since it is a weaker bond, it is easier to dissociate the molecule and create hydronium ions.


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